Excavator Operator Certification Exam Prep · Question
When constructing a benching system for an excavation, what is the primary safety purpose of ensuring benches are cut with adequate horizontal width?
The primary safety purpose of adequate bench width is to effectively distribute the soil load, reduce the pressure on lower trench walls, and prevent progressiv
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Question: When constructing a benching system for an excavation, what is the primary safety purpose of ensuring benches are cut with adequate horizontal width?
Answer options:
- To provide a wider working platform for workers within the trench.
- To allow for easier access and egress routes using ladders. ✅ To distribute the load of soil more effectively and prevent collapse by creating stable steps.
- To provide space for temporary storage of excavated material on the benches.
Correct answer: To distribute the load of soil more effectively and prevent collapse by creating stable steps.
Explanation: The primary safety purpose of adequate bench width is to effectively distribute the soil load, reduce the pressure on lower trench walls, and prevent progressive failure or collapse, thereby creating a more stable excavation face as per OHS guidelines on sloping and benching.
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Question explanations
- During a final inspection of an excavator, prior to beginning work, an operator notices significant play in th
- An excavator operator is preparing to dig a trench in cohesive soil. To achieve maximum breakout force, what a
- Which control typically governs the arm (or dipper arm) movement for an excavator?
- What condition might require sloping or shoring of a trench less than 1.2 meters (4 feet) deep?
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